throw out vs cast away

throw out and cast away both are verbs.

Word	Noun	Adjective	Verb	Adverb
throw out	No	No	Yes	No
cast away	No	No	Yes	No

As verbs, throw out and cast away are synonyms defined as:

throw out (verb)	cast away (verb)
bring forward for consideration or acceptance	throw or cast away
cease to consider; put out of judicial consideration
throw or cast away
remove from a position or office
force to leave or move out